M1A.1790 – Lead-induced chronic gout, unspecified ankle and foot, without tophus (tophi)

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Billable code

ICD-10-CM code M1A.1790

Code: M1A.1790 (claims format: M1A1790)
Description: Lead-induced chronic gout, unspecified ankle and foot, without tophus (tophi)
Short description: Lead-induced chronic gout, unsp ankle and foot, w/o tophus
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M05-M14 Inflammatory polyarthropathies
Parent codes: M1A › M1A.1 › M1A.17 › M1A.179

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`0`	without tophus (tophi)
`1`	with tophus (tophi)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M1A – Chronic gout

Excludes1 (not coded here):

gout NOS (M10.-)

Excludes2 (not included here):

acute gout (M10.-)

Use additional code:

code to identify:
Autonomic neuropathy in diseases classified elsewhere (G99.0)
Calculus of urinary tract in diseases classified elsewhere (N22)
Cardiomyopathy in diseases classified elsewhere (I43)
Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
Disorders of iris and ciliary body in diseases classified elsewhere (H22)
Glomerular disorders in diseases classified elsewhere (N08)

7th character note:

The appropriate 7th character is to be added to each code from category M1A

M1A.1 – Lead-induced chronic gout

Code first:

toxic effects of lead and its compounds (T56.0-)

Related codes in M1A.179

M1A.1791 – Lead-induced chronic gout, unspecified ankle and foot, with tophus (tophi)Billable

Frequently asked questions

What is ICD-10 code M1A.1790?

M1A.1790 is the ICD-10-CM code for lead-induced chronic gout, unspecified ankle and foot, without tophus (tophi), in the block M05-M14 (Inflammatory polyarthropathies).

Is M1A.1790 a billable code?

Yes. M1A.1790 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M1A.1790 belong to?

It belongs to category M1A – Chronic gout.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.